PPP multilink abuse, 100x 33.6k modem connections

After seeing The Serial Port's video using PPP multilink with a bunch of USR modems on WIndows XP, I just had to try doing an absurd number of connections between these two Cisco AS5400s. I do plan to do a more in-depth video on these AS5400 routers someday, just wanted to show this now as I have it up and running.

A few things I forgot to mention:
-I'm not entirely sure why these gateways will only reach 33.6k when initiating a modem call, the hardware clearly can support a full 56k on answer. It might be a configuration problem, in which case I have not found the option for it.
-I did also try running a VoIP call over this connection using an ATA, it did work for the most part, however the audio would intermittently cut out. I was really hoping it would work reliably, I could've done dialup over VoIP over dialup in that case...
-For some reason this entire link would randomly hang and stop passing any traffic at all in either direction. I only saw this twice when running with 60+ modems active, couldn't ever find a cause for it but breaking and re-establishing the connection would fix it.
-The voice feature cards were not put in fully because these AS5400s will only allow the voice feature cards OR the NextPort cards individually, not both at the same time.

Video made by The Serial Port which motivated me to try this:
   • Pushing Dial-up Modems Further Than We EVE...  

AS5400XM dialin configuration:
https://www.protostarlabs.net/network...

AS5400 dialout configuration:
https://www.protostarlabs.net/network...


0:00 Cisco AS5400 gateways
2:15 Video made by The Serial Port
2:46 Dialer interfaces and configuration
3:44 Channelized T3 interface
5:53 100 simultaneous modem connections
9:13 Testing